ACCIONA Windpower has upgraded its AW125/3000 wind turbine, with a new version specially designed for medium-wind sites (IEC IIb).

The company says this upgraded design allows for siting at locations with higher average wind conditions and lower turbulence intensity, which is ideal for many of the sites in North America and across the globe.

The AW125/3000 combines a 125-meter rotor with a 3 MW wind turbine generator and is available on multiple tower heights ranging from 87.5 meters to 140 meters. The company says that with the 87.5-meter tower, the AW125/3000 IEC IIb wind turbine - which has 61.2-meter-long blades - is positioned to deliver maximum annual energy production while staying within a 150-meter tip-height threshold in sites with aviation permitting constraints.

The first design assessment for the AW125/3000 IEC IIb is expected by year-end, and deliveries are available in early 2015.